Impacts of phase-locked loop bandwidth on millimeter wave three-dimensional imaging system

Chunhui Fang; Wenmin Yu; Yukun Zhu; Liang Wu; Tianyu Pen; Xiaowei Sun

doi:10.1587/elex.16.20190187

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Impacts of phase-locked loop bandwidth on millimeter wave three-dimensional imaging system

Chunhui Fang, Wenmin Yu, Yukun Zhu, Liang Wu, Tianyu Pen, Xiaowei Sun

Author information

Chunhui Fang
Key Laboratory of Terahertz Solid-State Technology of Chinese Academy of Sciences, Shanghai Institute of Microsystem and Information Technology
University of Chinese Academy of Sciences
Wenmin Yu
Key Laboratory of Terahertz Solid-State Technology of Chinese Academy of Sciences, Shanghai Institute of Microsystem and Information Technology
University of Chinese Academy of Sciences
Yukun Zhu
Key Laboratory of Terahertz Solid-State Technology of Chinese Academy of Sciences, Shanghai Institute of Microsystem and Information Technology
Liang Wu
Key Laboratory of Terahertz Solid-State Technology of Chinese Academy of Sciences, Shanghai Institute of Microsystem and Information Technology
Tianyu Pen
Key Laboratory of Terahertz Solid-State Technology of Chinese Academy of Sciences, Shanghai Institute of Microsystem and Information Technology
University of Chinese Academy of Sciences
Xiaowei Sun
Key Laboratory of Terahertz Solid-State Technology of Chinese Academy of Sciences, Shanghai Institute of Microsystem and Information Technology

Keywords: PLL, loop bandwidth, phase noise, SNR, MMW imaging

JOURNAL FREE ACCESS

2019 Volume 16 Issue 11 Pages 20190187

DOI https://doi.org/10.1587/elex.16.20190187

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Abstract

Signal-to-noise ratio (SNR) of the millimeter wave (MMW) three-dimensional (3D) imaging system plays a critical role in the imaging quality. The impacts of phase-locked loop (PLL) bandwidth on SNR of the imaging system is demonstrated and the relationship between SNR and imaging resolution is analyzed in this paper. Analytical and experimental results show that choosing the optimum PLL loop bandwidth can maximize the SNR and greatly improve the performance of MMW imaging system.

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